81955420

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{233}}^1\times {\mathrm{409}}^1$

素因数の和:694

約数の個数: 48

約数和(自身を含む): 177297120

約数和(自身を除く): 95341700

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 233, 409, 430, 466, 818, 860, 932, 1165, 1636, 2045, 2330, 4090, 4660, 8180, 10019, 17587, 20038, 35174, 40076, 50095, 70348, 87935, 95297, 100190, 175870, 190594, 200380, 351740, 381188, 476485, 952970, 1905940, 4097771, 8195542, 16391084, 20488855, 40977710, 81955420]

約数ペア:

[(1, 81955420), (2, 40977710), (4, 20488855), (5, 16391084), (10, 8195542), (20, 4097771), (43, 1905940), (86, 952970), (172, 476485), (215, 381188), (233, 351740), (409, 200380), (430, 190594), (466, 175870), (818, 100190), (860, 95297), (932, 87935), (1165, 70348), (1636, 50095), (2045, 40076), (2330, 35174), (4090, 20038), (4660, 17587), (8180, 10019)]